1. School of Nursing, Johns Hopkins University, Baltimore, MD, USA
2. Jhpiego, A Johns Hopkins University affiliate, Baltimore, MD, USA
3. International Vaccine Access Center, Johns Hopkins University Bloomberg School of Public Health, MD, USA
4. Département de Psychologie, Université du Québec à Montréal, Montréal, QC, USA
5. College of Medicine, Drexel University, Philadelphia, USA